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-rw-r--r--fs/aufs/sysrq.c157
1 files changed, 0 insertions, 157 deletions
diff --git a/fs/aufs/sysrq.c b/fs/aufs/sysrq.c
deleted file mode 100644
index a3e95bce6..000000000
--- a/fs/aufs/sysrq.c
+++ /dev/null
@@ -1,157 +0,0 @@
-/*
- * Copyright (C) 2005-2015 Junjiro R. Okajima
- *
- * This program, aufs is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-/*
- * magic sysrq hanlder
- */
-
-/* #include <linux/sysrq.h> */
-#include <linux/writeback.h>
-#include "aufs.h"
-
-/* ---------------------------------------------------------------------- */
-
-static void sysrq_sb(struct super_block *sb)
-{
- char *plevel;
- struct au_sbinfo *sbinfo;
- struct file *file;
- struct au_sphlhead *files;
- struct au_finfo *finfo;
-
- plevel = au_plevel;
- au_plevel = KERN_WARNING;
-
- /* since we define pr_fmt, call printk directly */
-#define pr(str) printk(KERN_WARNING AUFS_NAME ": " str)
-
- sbinfo = au_sbi(sb);
- printk(KERN_WARNING "si=%lx\n", sysaufs_si_id(sbinfo));
- pr("superblock\n");
- au_dpri_sb(sb);
-
-#if 0
- pr("root dentry\n");
- au_dpri_dentry(sb->s_root);
- pr("root inode\n");
- au_dpri_inode(d_inode(sb->s_root));
-#endif
-
-#if 0
- do {
- int err, i, j, ndentry;
- struct au_dcsub_pages dpages;
- struct au_dpage *dpage;
-
- err = au_dpages_init(&dpages, GFP_ATOMIC);
- if (unlikely(err))
- break;
- err = au_dcsub_pages(&dpages, sb->s_root, NULL, NULL);
- if (!err)
- for (i = 0; i < dpages.ndpage; i++) {
- dpage = dpages.dpages + i;
- ndentry = dpage->ndentry;
- for (j = 0; j < ndentry; j++)
- au_dpri_dentry(dpage->dentries[j]);
- }
- au_dpages_free(&dpages);
- } while (0);
-#endif
-
-#if 1
- {
- struct inode *i;
-
- pr("isolated inode\n");
- spin_lock(&inode_sb_list_lock);
- list_for_each_entry(i, &sb->s_inodes, i_sb_list) {
- spin_lock(&i->i_lock);
- if (1 || hlist_empty(&i->i_dentry))
- au_dpri_inode(i);
- spin_unlock(&i->i_lock);
- }
- spin_unlock(&inode_sb_list_lock);
- }
-#endif
- pr("files\n");
- files = &au_sbi(sb)->si_files;
- spin_lock(&files->spin);
- hlist_for_each_entry(finfo, &files->head, fi_hlist) {
- umode_t mode;
-
- file = finfo->fi_file;
- mode = file_inode(file)->i_mode;
- if (!special_file(mode))
- au_dpri_file(file);
- }
- spin_unlock(&files->spin);
- pr("done\n");
-
-#undef pr
- au_plevel = plevel;
-}
-
-/* ---------------------------------------------------------------------- */
-
-/* module parameter */
-static char *aufs_sysrq_key = "a";
-module_param_named(sysrq, aufs_sysrq_key, charp, S_IRUGO);
-MODULE_PARM_DESC(sysrq, "MagicSysRq key for " AUFS_NAME);
-
-static void au_sysrq(int key __maybe_unused)
-{
- struct au_sbinfo *sbinfo;
-
- lockdep_off();
- au_sbilist_lock();
- list_for_each_entry(sbinfo, &au_sbilist.head, si_list)
- sysrq_sb(sbinfo->si_sb);
- au_sbilist_unlock();
- lockdep_on();
-}
-
-static struct sysrq_key_op au_sysrq_op = {
- .handler = au_sysrq,
- .help_msg = "Aufs",
- .action_msg = "Aufs",
- .enable_mask = SYSRQ_ENABLE_DUMP
-};
-
-/* ---------------------------------------------------------------------- */
-
-int __init au_sysrq_init(void)
-{
- int err;
- char key;
-
- err = -1;
- key = *aufs_sysrq_key;
- if ('a' <= key && key <= 'z')
- err = register_sysrq_key(key, &au_sysrq_op);
- if (unlikely(err))
- pr_err("err %d, sysrq=%c\n", err, key);
- return err;
-}
-
-void au_sysrq_fin(void)
-{
- int err;
-
- err = unregister_sysrq_key(*aufs_sysrq_key, &au_sysrq_op);
- if (unlikely(err))
- pr_err("err %d (ignored)\n", err);
-}